Pencil-sharpener.



PATENTED JULY 28,. 1908.

F. 0. PORTER. PENCIL SHABPENER. APPLICATION PILED Nov. .5,;19o7

Invenio .I'rank UNITED STATES PATENT oFFioE.

FRANK OLIVER PORTER, OF WOLLASTON, MASSACHUSETTS, ASSIGNOR TO LOUIS S. ROTHENBERG, OF BOSTON, MASSACHUSETTS.

rnnorn-sminrnnnn.

Specification of Letters Patent.

Patented July 28, 1908.

Application filed November 5, 1907. Serial No. 400,766.

To all whom it may concern:

Be it known that I, FRANK OLIVER POR- TER, a citizen of the United States of America and has for its object the production of a machine in which a pencil of any size may be held rigidly while a revoluble cutter operates upon the same to sharpen it, the chips caused by said sharpening being delivered to a receptacle which is arranged to receive them, whether the receptacle is secured to a wall or to a table.

The invention consists in certain novel features of construction and arrangement of parts which will be readily understood by reference to the description of the drawings and to the claims hereinafter given;

Of the drawings: Figure'l representsan elevation of a encil sharpener embodying the features of tliis invention. Fig. 2 represents an end View of the same. Fig. 3 re resents a section of the same, the cutting plane being on line 33 on Fig. 1. Fig. 4 represents a transverse sectionof the same, the cutting plane being on line 44 on Fig. 2. Fig. 5 represents an elevation of the upper part of the end opposite that shown in Fig. 2.

ig. 6 represents an elevation of the jawcarrying support. Fig. 7 represents a section of the same, the cutting plane being on line 7 7 Fig. 8 represents asection throu h the main portion of the chip receptac e. Figs. 9 and 10 represent perspective views of the detachable sides therefor, and Fig. 11 represents a detail showin the devices for locking the detachable si es to said main portion.

Similar characters designate like parts throughout the several figures of the drawings.

In the drawings, 12 represents a U-sha ed member bent into the position shown in igs. 1 and 4 from a metal plate, one side 12 thereof being provided at its outer end with a bearing 13 while the other side 12 thereof has fixed in its outer end a bearin 14 which isprovided with a plurality of radial slots 15 in each of which is adapted to be mounted a radial gripping jaw 16. The periphery of the annular bearing 14 is provided with a groove 17 in which projects the inner edge which it is desired to sharpen.

of a plate 18 having extending theretlirough a plurality of eccentric cam slots 19 into which extend the outer projecting ends, 20 of the radial jaws 16. The plate 18 is provided with a handle 21 by which said late may be moved about thebearing 14 in the groove17, thereby causing the radial jaws 16 to be moved toward and from the aXis of said bearing 14.

A spring 22 is secured at 23 to the side plate 12 of the U-shaped member 12 while the opposite end of saidspring is secured at 24 to the plate 18, the tension of said spring being such as to normally retain the disk plate 18 in the position shown in Fig. 2 with the jaws 16 in their innermost position. Supported in the bearings 13 and 14 is a revoluble member 25 provided with a conical receptacle 26 into which slightly projects the cutting edge of a tan ential cutter blade 27 secured to said revolu ble member by a screw 28. The receptacle 26 is in axial line with the center of the bearings 13 and 14 and it is adapted to receive therein the end of a pencil Riveted to the outer end of the revoluble member is a handle 29 by which the member 25 may be revolved to cause the blade 27 to act upon the end of the pencil inserted within the receptacle 26 andshave therefrom a certain member 12 is rovided at either edge thereof U intermediate t e sides 12 and 12 with slots 33 with which the projection 34 on the ends of the side plates 35 and 36 are adapted to co-act, to position them relativeto the sides 12" and 12. When the projecting members 34 have been inserted in the slots 33 the T- shaped projections 37 from the edges of said side plates 35 or 36 are adapted to engage with notches 38 in the edges of the side members 12 and 12 to securely lock the side plates 35 and 36 in position to form the chip receptacle 31. Each of, the notches 38 is provided with a slight shoulder 39 which retains the projecting members in position until force is applied thereto to s ring the protacle beneath said cutting member for the jecting member over said shou der when it is desired to dismantle the receptacle. The side plate is provided with an extension which partially surrounds the revoluble cutting member 25, this extension being chiefly used when the receptacle 31 is attached to a side wall with the plate 35 utilized as the bottom of the receptacle. Openings il through the bottom plate 12 of the U-shaped member 12 are rovided by which with suitable screws the evice may be secured either to a table or a side wall. This makes a very cheap construction of a pencil sharpener, the receptacle and all of the parts thereof being struck out of sheet metal which are readily locked together without rivets, screws, or other instrumentalities.

The gripping device is so situated as to clip the pencil in axial line with the revoluble cutting member and the spring 2 operates to hold the gripping jaws always in contact with the pencil during the operation of cutting.

It is believed that the o eration of the invention and the many a vantages of a device of this construction will be thoroughly apparent from the foregoing without any further description.

Having thus described my invention, 1 claim:

1. In a pencil sharpener, the combination of a revoluble cutting member and a recepreception of the chips, consisting of a box having two sides each rovided with notches in the edges and si es having projecting members adapted to engage said notches.

2. In a pencil sharpener, the combination of a revoluble cutting member; and a chip receptacle beneath said revoluble cutting member, consisting of a U-shaped member having slots in the bottom portion and notches in the edges of the sides and detachable sides having projecting members at one end adapted to engage said slots and other members projecting from the edges thereol' adapted to engage said notches.

3. In a pencil sharpener, the com|. ination of a revoluble cutting member and. a chip receptacle beneath said revoluble cutting member, consisting of a U-shaped member having slots in the bottom portion and notches in the edges of the sides and detachable. sides having projecting members at one end adapted to engage said slots and other members projecting from the edges thereof adapted to engage said notches, one of said detachable sides being extended to partially surround said revoluble member.

Signed by me at Boston, Mass, this 22d day of October, 1907.

FRANK OLIVER PORTER. WVitnesses A. A. ROTHENBERG, LOUIS S. RQ'rI-IENBERG. 

